Systems and methods of a glenoid component

ABSTRACT

A glenoid component includes a body, a first, convex surface, a second, concave surface, a third surface connecting the first and second surfaces, a channel, and at least one alignment member. The channel extends from a first channel opening of the first surface through the body to a second channel opening defined on the third surface and has a channel axis extending through the first and second channel openings. The channel axis intersects a first plane defined by the first channel opening at an angle transverse to the first plane. The channel is configured to receive a bone engagement member to attach the body to a shoulder bone. The at least one alignment member extends from the first surface to align the body to the shoulder bone. The bone engagement member can attach the body to the shoulder bone.

TECHNICAL FIELD

The present disclosure generally relates to the field of shoulderreplacement surgery, and more specifically to systems and methods ofall-metal glenoid components.

BACKGROUND

Total shoulder arthroplasty (TSA), a type of shoulder replacementsurgery, is performed to repair a patient's shoulder joint, such as whenjoints have bene damaged or lose functionality due to disease, boneloss, or arthritis. Glenohumeral arthritis can occur in the posteriorpart of the shoulder joint and can erode the glenoid eccentrically. Insome cases, the humeral head becomes decentered and erodes the posteriorpart of the shoulder joint, making it difficult to anchor a glenoidcomponent to the shoulder bone. A glenoid component, such as a plasticaugmented glenoid component, may be cemented to the shoulder bone, and abone graft may be used to address the problem of bone loss. However,even with a bone graft, posterior bone erosion can occur even after atotal shoulder arthroplasty, which may cause additional problems andreduce the effectiveness of a total shoulder arthroplasty.

SUMMARY

According to an aspect of the present disclosure, the glenoid componentincludes a body, a first surface, a second surface, a third surface, achannel, at least one alignment member and a bone engagement member. Thefirst surface has a convex shape. The second surface has a concave shapeand is opposite the first surface. The third surface connects the firstsurface to the second surface. The channel extends from a first channelopening of the first surface through the body to a second channelopening defined on the third surface. The channel has a channel axisextending through the first channel opening and the second channelopening. The channel axis intersects a first plane defined by the firstchannel opening at an angle transverse to the first plane. The channelis configured to receive a bone engagement member to attach the body toa shoulder bone. The at least one alignment member extends from thefirst surface to align the body to the shoulder bone. The boneengagement member can attach the body to the shoulder bone. The boneengagement member can occupy at least a portion of the channel.

In some embodiments, the at least one alignment member includes a firstalignment member. The first alignment member defines a first alignmentaxis and a second alignment member defines a second alignment axis. Thefirst alignment axis and second alignment axis define a second planeperpendicular to the first plane. The channel axis intersects the secondplane between the first alignment axis and the second alignment axis.The glenoid component

In some embodiments, the third surface defines a first, maximumdiameter. The third surface can define a second diameter that isperpendicular to and bisects the first diameter. The second channelopening can be closer to the second diameter than the first diameter.

In some embodiments, a width of the third surface adjacent to the secondchannel opening can be greater than a width of the third surface on anopposite side of the third surface from the second channel opening.

In some embodiments, the third surface defines a first tangent linetangent to the third surface adjacent to the second channel opening anda second tangent line tangent to the third surface on an opposite sideof the third surface from the second channel opening. A first angledefined between a second plane perpendicular to the first tangent lineand the first surface where the third surface meets the first surface isgreater than or equal to 5 degrees and less than or equal to 45 degreesor a second angle defined between a third plane perpendicular to thesecond tangent line and the first surface where the third plane meetsthe first surface is greater than or equal to 5 degrees and less than orequal to 45 degrees.

In some embodiments, the body defines a bisecting plane that bisects thebody and is perpendicular to the first surface. The at least onealignment member can be on an opposite side of the bisecting plane fromthe second channel opening.

In some embodiments, the second surface is free of openings. The boneengagement member can be received posteriorly to anteriorly by thechannel. The at least one alignment member can be integral with thebody. The first surface can be textured.

According to another aspect of the present disclosure, a total shoulderarthroplasty system includes a body. The body includes a first surfacethat has a convex shape. The body includes a second surface opposite thefirst surface. The second surface has a concave shape. The systemincludes a third surface connecting the first surface to the secondsurface. The system includes a channel extending from a first channelopening of the first surface through the body to a second channelopening defined on the third surface. The channel has a channel axisextending through the first channel opening and the second channelopening. The channel axis intersects a first plane defined by the firstchannel opening at an angle transverse to the first plane. The channelis configured to receive a bone engagement member to attach the body toa shoulder bone. The at least one alignment member extends from thefirst surface to align the body to the shoulder bone. The systemincludes a bone engagement member to attach the body to the shoulderbone. The bone engagement member occupies at least a portion of thechannel.

Some or all of the systems, components, and subcomponents of the presentdisclosure can be single-use or disposable. Also some or all of thesystems, components, and subcomponents of the present disclosure can bemade of a unitary construction (formed from a single piece of metal,plastic, or other material) or unitary modular construction (pluralityof components and/or subcomponents permanently connected by standardmeans, such as welding or soldering), or of modular construction(plurality of components and/or subcomponents removably connected bystandard means, such as threading or snap-fitting).

These and other features of various embodiments can be understood from areview of the following detailed description in conjunction with theaccompanying drawings.

It is to be understood that both the foregoing general description andthe following detailed description are explanatory and are notrestrictive of the present disclosure, as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an embodiment of a glenoid componentfixed to a portion of a shoulder bone.

FIG. 2 is a perspective view of an embodiment of the glenoid componentof FIG. 1.

FIG. 3 is a perspective view of an embodiment of the glenoid componentof FIG. 1.

FIG. 4 is a side view of an embodiment of the glenoid component of FIG.1.

FIG. 5 is a side view of an embodiment of the glenoid component of FIG.1.

FIG. 6 is a side view of an embodiment of the glenoid component of FIG.1 with a bone engagement member disposed within the channel.

FIG. 7 is a side view of an embodiment of the glenoid component of FIG.1.

FIG. 8 is a side view of an embodiment of the glenoid component of FIG.1.

FIG. 9 is a perspective view of the glenoid component proximate to areamed portion of shoulder bone.

DETAILED DESCRIPTION

The following detailed description and the appended drawings describeand illustrate various glenoid component systems and methods. Thedescription and drawings are provided to enable one of skill in the artto make and use one or more glenoid component systems and/or practiceone or more methods. They are not intended to limit the scope of theclaims in any manner.

The use of “e.g.” “etc.,” “for instance,” “in example,” and “or” andgrammatically related terms indicates non-exclusive alternatives withoutlimitation, unless otherwise noted. The use of “optionally” andgrammatically related terms means that the subsequently describedelement, event, feature, or circumstance may or may not bepresent/occur, and that the description includes instances where saidelement, event, feature, or circumstance occurs and instances where itdoes not. The use of “attached” and “coupled” and grammatically relatedterms refers to the fixed, releasable, or integrated association of twoor more elements and/or devices with or without one or more otherelements in between. Thus, the term “attached” or “coupled” andgrammatically related terms include releasably attaching or fixedlyattaching two or more elements and/or devices in the presence or absenceof one or more other elements in between. As used herein, the terms“proximal” and “distal” are used to describe opposing axial ends of theparticular elements or features being described in relation toanatomical placement.

In existing solutions, shoulder replacement devices may fail to stop oreven exacerbate posterior bone erosion, resulting in the overallineffectiveness or reduced lifetime of the shoulder replacement device.Although bone grafts may be used to address the problem of bone loss,posterior bone erosion can occur even after a total shoulderarthroplasty (TSA), which may cause additional problems and reduce theeffectiveness of the TSA procedure. The present solution providescomponent systems and methods for improving shoulder prosthesis by usingan all-metal glenoid component. The glenoid component includes a body, afirst surface, a second surface, a third surface, a channel, and atleast one alignment member. The first surface has a convex shape. Thesecond surface has a concave shape and is opposite the first surface.The third surface connects the first surface to the second surface. Thechannel extends from a first channel opening of the first surfacethrough the body to a second channel opening defined on the thirdsurface. The channel has a channel axis extending through the firstchannel opening and the second channel opening. The channel axisintersects a first plane defined by the first channel opening at anangle transverse to the first plane. The channel is configured toreceive a bone engagement member to attach the body to a shoulder bone.The at least one alignment member extends from the first surface toalign the body to the shoulder bone.

Referring to FIG. 1, a perspective view of a shoulder prosthesisincluding a glenoid component 100 fixed to a portion 102 of a shoulderbone is shown. In some embodiments, the shoulder bone is a scapula. Theglenoid component 100 can be oriented and secured (e.g. fixed, attached,etc.) to the portion 102 of the shoulder bone. In some embodiments,securing the glenoid component to the portion 102 of the shoulder bonereduces stress on the portion 102 of the shoulder bone to mitigateglenoid bone loss or posterior bone erosion. The portion 102 of theshoulder bone can be manipulated or altered through mechanical reaming.In some embodiments, the glenoid component 100 is an all-metalcomponent. In some embodiments, the glenoid component 100 is inset intothe portion 102 of the shoulder bone.

In some embodiments, the glenoid component 100 acts a socket in aball-and-socket joint between a humeral head component (not shown)coupled to a humerus and the shoulder bone. The present solution canimprove the effectiveness of a shoulder prosthesis for a patient,including relieving joint paint pain caused by shoulder arthritis andimproving a range of motion of the shoulder joint.

In some embodiments, the glenoid component 100 is provided in a surgicalkit. For example, the glenoid component 100 can be provided in asurgical kit that includes the humeral head component and a humeral stemcomponent, such as a surgical kit used to perform total shoulderarthroplasty. The glenoid component 100 can be customized or otherwisedesigned to match a particular glenoid cavity or surgical reaming of aglenoid cavity. For example, the glenoid component 100 can be sized fora particular bone density or glenoid cavity dimensions.

In some embodiments, the glenoid component 100 is customized orotherwise designed for compatibility with a particular patient. Forexample, a model of the glenoid component 100 can be generated based oninformation regarding the shoulder of a patient, such as imaging data(e.g., Mill data, etc.). The information can indicate target location onthe portion 102 for securing the glenoid component to the portion 102.For example, the information can include target can include targetlocations on a surface of the portion 102 through which a boneengagement member will be driven to secure the glenoid component 100 tothe portion 102. The information can indicate locations on the portion102 where bone loss has occurred or may occur, such as for avoidingthese locations when securing the glenoid component 100 to the portion102.

Referring to FIG. 2, a perspective view of an embodiment of the glenoidcomponent 100 is shown. The glenoid component includes a body 202. Thebody 202 can include a variety of shapes. For example, in variousembodiments, the body 202 can include a substantially disk shape, asubstantially bowl shape, or any other shape allowing the glenoidcomponent 100 to act as part of a shoulder prosthesis. The body 202 canbe made of metal, such as cobalt chrome or titanium. A body 202 made ofmetal can provide wear resistance against bone loss, such as posteriorbone loss due to the humeral head wearing out the posterior part of theshoulder joint. In some embodiments, the body 202 is made of metal. Forexample, the body 202 can be made of an all-metal component.

The body 202 includes a first surface 204 that is convex. The convexshape of the first surface 204 allows the first surface to engage withthe glenoid cavity or glenoid fossa of scapula. In some embodiments, theglenoid cavity can be surgically reamed to provide a contour-matchinginterface for the first surface 204 of the glenoid component 100. Insome embodiments, the first surface 204 is made of a metal, such astitanium or cobalt chrome. The first surface can include a biocompatibleroughened metal. The roughened metal can be applied onto the body 202,for example, through a grid-blasting process or plasma spray process,and can facilitate bony ingrowth onto the first surface 204 to improvefixation of the glenoid component 100 to the portion 102. The firstsurface 204 can have pores that facilitate bony ingrowth. In someembodiments, the first surface 204 can have a substantially oblongshape. The shape of the first surface 204 can conform to the shape ofthe glenoid cavity of the shoulder bone. The glenoid cavity of theshoulder bone can have a substantially oblong shape. The shape of theglenoid component 100 can be such that it fits into the glenoid cavityof the shoulder bone with minimal surgical invasiveness, which caninclude reaming of bone. The body 202, when formed using metal, can haveimproved fixation to the portion 102 relative to plastic components; forexample, the body 202 can withstand greater biomechanical forces, ascompared to plastic, which may slide on the portion 102 when receivingsuch forces.

The body 202 includes a second surface 206 that is concave. The secondsurface 206 is opposite the first surface 204. The concave shape of thesecond surface 206 allows the second surface 206 to engage otherportions of a shoulder prosthesis system, such as a humeral headcomponent (not shown). For example, the concave shape of the secondsurface 206 can provide the glenoid component 100 to act as a socket ina ball-and-socket prosthesis system such that the humeral head canarticulate about the second surface 206. The second surface 206 has asubstantially oblong shape. In some embodiments, the oblong shape of thesecond surface 206 can mimic a naturally occurring glenoid cavity foundin a human shoulder bone. In some embodiments, the second surface 206 isan articulating surface about which a humeral head component or aglenosphere articulates. In some embodiments, the second surface 206 ismade of a metal, such as cobalt chrome. In some embodiments, the secondsurface 206 is made of cobalt chrome to provide more scratch resistancethan titanium would provide.

In some embodiments, the second surface 206 is free of openings or doesnot define any openings. For example, the channel 304 as shown in FIG. 3and described herein does not extend through the second surface 206. Insome embodiments, any concavity of the second surface 206 does notextend through to the first surface 204. The second surface 206 beingfree of openings reduces the likelihood that particulate mattergenerated by friction the humeral head component and the body 202 canmove into the glenoid cavity, or that particulate matter generated byfriction between the body 202 and the glenoid cavity can move towardsthe humeral head.

The glenoid component 100 includes a third surface 208. The thirdsurface 208 connects the first surface 204 to the second surface 206. Insome embodiments, the third surface 208 can include a rim encircling aportion of the glenoid component. For example, the third surface 208 canconnect an edge 205 of the first surface 204 to an edge 207 of thesecond surface 206. In some embodiments, the third surface 208 spacesthe edge 205 of the first surface 204 from the edge 207 of the secondsurface 206 by a thickness 209 of the third surface 208. In someembodiments, the thickness 209 is a variable thickness. In someembodiments, the thickness is a constant thickness. The edge 205 of thefirst surface 204 can include a variety of shapes. For example, invarious embodiments, the edge 205 can include a pencil shape, a bevelshape, a half bullnose, an ogee shape or any other shape that allows thefirst surface 204 to interface with the glenoid cavity. The edge 207 ofthe second surface 206 can include a variety of shapes. For example, invarious embodiments, the edge 207 can include a square shape, a pencilshape, a bevel shape, a half bullnose, an ogee shape or any other shapethat allows the first surface 207 to interface with a humeral head.

The glenoid component 100 can receive a bone engagement member 210. Insome embodiments, the bone engagement member 210 attaches the glenoidcomponent 100 to a shoulder bone. In some embodiments, the boneengagement member 210 can be located inside a channel 304 as shown inFIG. 3 and described herein. In some embodiments, the bone engagementmember 210 can be configured to secure the glenoid component 100 to theportion 102 of the shoulder bone. The bone engagement member 210 caninclude engagement features (e.g., threads located on an outer surfaceof the bone engagement member 210) or other elements allowing the boneengagement member 210 to be driven through a surface of the portion 102to be frictionally secured in the shoulder bone. In some embodiments,the bone engagement member 210 is made of metal. In some embodiments,the bone engagement member 210 does not pass through the second surface206. The bone engagement member 210 can be a compression screw thatengages with an angled surface, such as a chamfer, of the channel 304.The bone engagement member can be a locking screw having threads thatengage with thread receiving features of the channel 304.

In some embodiments, the bone engagement member 210 enters the channel304 posteriorly to anteriorly to prevent the humeral head fromdislocating posteriorly. For example, posteriorly to anteriorly caninclude from the back side of the shoulder bone to the front side of theshoulder bone. In human subjects, the back side of the shoulder bone canbe towards the dorsal side and the front side of the shoulder bone canbe towards the ventral side. Posteriorly can include from the posterioror dorsal side. Anteriorly can include from the anterior or ventralside. In some embodiments, the bone engagement member 210 applies aforce posteriorly to anteriorly to resist against posterior movement ofthe humeral head. In some embodiments, the bone engagement member 210applies a force against the body 202 to secure the body 202 to theportion 102 of the shoulder bone. For example, the bone engagementmember 210 can transmit a compressive force between the glenoidcomponent 100 and the portion 102 of the shoulder bone.

In some embodiments, the bone engagement member 210 is situated in thechannel 304. For example, the bone engagement member can be partially orcompletely within the channel 304. In some embodiments, the boneengagement member 210 can be restricted from exiting the channel 304 inone direction due to the shape of the channel 304 preventing thecomplete expulsion of the bone engagement member 210. In someembodiments, the bone engagement member 210 can only enter the channel304 through the third surface 208. For example, the channel 304 caninclude a beveled section that prevents the bone engagement member 210to pass completely through the channel 304. In some embodiments, thebone engagement member 210 extends past the alignment members 212 asdescribed below.

The contact between the glenoid component 100 and the portion 102 of theshoulder bone can promote bone ingrowth or osseointegration. Contactbetween the glenoid component 100 and the portion 102 of the shoulderbone can include a fixed connection between the glenoid component 100and the portion 102 of the shoulder bone. Bone ingrowth can include boneformation within an irregular surface of an implant, such as the glenoidcomponent 100. Osseointegration can include a structural and functionalconnection between the surface of a load-carrying implant and a livingbone. In some embodiments, osseointegration may result from a lack ofnegative tissue response coming from the portion 102 of the shoulderbone.

The glenoid component 100 can include at least one alignment member 212.In some embodiments, the at least one alignment member 212 can extendfrom the first surface 204 to align the body 202 to the shoulder bone.The at least one alignment member 212 can include a variety of shapes.For example, in various embodiments, the at least one alignment member212 can include a substantially peg shape, a substantially cylindricalshape, a substantially conical shape, or any other shape allowing the atleast one alignment member 212 to insert into a cavity or hole. The atleast one alignment member 212 can have flanges (e.g., at a distal endopposite the first surface 204). The at least one alignment member 212can have threads to facilitate bony ingrowth. In some embodiments, theat least one alignment member 212 can have a length extending away fromthe first surface 204. The length may be five millimeters. The lengthmay be greater than or equal to two millimeters and less than or equalto ten millimeters. The length may be greater than or equal to threemillimeters and less than or equal to nine millimeters. The length maybe greater than or equal to four millimeters and less than or equal tosix millimeters. The at least one alignment member 212 can have adiameter. The diameter can be four millimeters. The diameter may begreater than or equal to two millimeters and less than or equal to tenmillimeters. The diameter may be greater than or equal to threemillimeters and less than or equal to nine millimeters. In someembodiments, the glenoid component 100 can include multiple alignmentmembers 212 to align the body 202 to the shoulder bone. In someembodiments, the at least one alignment members 212 slot into alignmentmember cavities 902 in the shoulder bone as shown in FIG. 9 anddescribed herein. In some embodiments, the at least one alignment member212 can be driven into the portion 102 of the shoulder bone. The atleast one alignment member 212 can be detached from the portion 102 ofthe shoulder bone through a transverse motion of the glenoid component.

In some embodiments, the at least one alignment member 212 is integralwith the body 202 of the glenoid component 100. The at least onealignment member 212 can be located on the first surface 204 away froman edge 205 of the first surface 204. In some embodiments, the at leastone alignment member 212 can extend away from the first surface 204. Insome embodiments, the at least one alignment member 212 is locatedcloser to the first channel opening 306 that to the second channelopening 308. In some embodiments, the at least one alignment member 212can include two or more alignment members 212. For example, the at leastone alignment member 212 can include exactly two alignment members 212.In some embodiments, the at least one alignment member 212 has a taperedhead. For example, the top of the alignment member 212 can be a smallerwidth, thickness or diameter than the main body of the alignment member212.

Referring to FIG. 3, a perspective view of an embodiment of the glenoidcomponent is shown. In some embodiments, the glenoid component 100includes a channel 304. The channel 304 can extend from a first channelopening 306 disposed on the first surface 204 through the body 202 to asecond channel opening 308 disposed on the third surface 208. Thechannel 304 can extend from the third surface 208 through the body 202to the first surface 204 enabling improved fixation of the glenoidcomponent 100 while avoiding the creation of openings on the secondsurface 206. In this way, the second surface 206 can be free from anyopenings or voids on the second surface 206. The channel 304 can beconfigured to receive a bone engagement member 210. For example, thechannel 304 can include engagement receiving features (e.g., slots,threads located on the surface of channel 304 extending from channel304, etc.) configured to reciprocally engage engagement features of thebone engagement member 210. In some embodiments, the channel 304 is aconstant width, thickness, or diameter. The channel 304 can be avariable width, thickness, or diameter.

In some embodiments, the first channel opening 306 is located on thesecond diameter 504. In some embodiments, the first channel opening 306is located between the at least one alignment member 212. The firstchannel opening 306 can include a variety of shapes. For example, invarious embodiments, the first channel opening 306 can include asubstantially disk shape, a substantially ovular, or any other shapeallowing a bone engagement member 210 to pass through the first channelopening 306.

In some embodiments, the second channel opening 308 is located on thefirst diameter 502 as shown in FIG. 5 and described herein. In someembodiments, the second channel opening 308 is located between the atleast one alignment member 212. The second channel opening 308 caninclude a variety of shapes. For example, in various embodiments, thesecond channel opening 308 can include a substantially disk shape, asubstantially ovular, or any other shape allowing a bone engagementmember 210 to pass through the second channel opening 308.

The channel 304 can define a channel axis 310 passing through the body202. The channel axis 310 can extend through the first channel opening306 and the second channel opening 308. The channel axis 310 canintersect a first plane 802 as shown in FIG. 8 and described hereindefined by the first channel opening 306 at an angle 804 transverse tothe first plane 802. In some embodiments, the channel 304 is configuredto receive a bone engagement member 210 to attach the glenoid component100 to a shoulder bone. For example, the bone engagement member 210 canbe received posteriorly-to-anteriorly, through the second channelopening 308 through the channel 304 and extending out of the firstchannel opening 306 to engage the portion 102 of the shoulder bone.

Referring to FIG. 4, a side view of an embodiment of the glenoidcomponent 100 is shown. The second surface 206 can be a surface with alow frictional coefficient to allow a humeral head (not shown) or aglenosphere (not shown) to easily articulate about the second surface206. The second surface 206 can have a substantially concave shape. Insome embodiments, the concave shape of the second surface 206 allows thesecond surface 206 to engage other portions of a shoulder prosthesissystem, such as a humeral head component (not shown). For example, theconcave shape of the second surface 206 can provide the glenoidcomponent 100 to act as a socket in a ball-and-socket prosthesis systemsuch that the humeral head can articulate about the second surface 206.The second surface 206 has a substantially oblong shape. In someembodiments, the oblong shape of the second surface 206 can mimic anaturally occurring glenoid cavity found in a human shoulder bone. Insome embodiments, the second surface 206 is an articulating surfaceabout which a humeral head component or a glenosphere articulates. Insome embodiments, the second surface 206 is made of a metal, such ascobalt chrome.

In some embodiments, the second surface 206 is free of openings or doesnot define any openings. For example, the channel 304 does not extendthrough the second surface 206. The second surface 206 being free ofopenings reduces the likelihood that particulate matter generated byfriction the humeral head component and the body 202 can move into theglenoid cavity, or that particulate matter generated by friction betweenthe body 202 and the glenoid cavity can move towards the humeral head.

Referring to FIG. 5, a side view of an embodiment of the glenoidcomponent 100 is shown. The first surface 204 can include frictionalelements configured to frictionally engage the first surface 204 to theportion 102 of the shoulder bone to promote bone ingrowth. For example,the first surface 204 can include a textured surface that enhancesfrictional engagement between the first surface 204 and the portion 102of the shoulder bone. A textured surface can include a surface with ahigh number of spaced surface irregularities or roughness. In someembodiments, the first surface 204 can have a substantially oblongshape. The shape of the first surface 204 can conform to the shape ofthe glenoid cavity of the shoulder bone. The glenoid cavity of theshoulder bone can have a substantially oblong shape. The shape of theglenoid component 100 can be such that it fits into the glenoid cavityof the shoulder bone with minimal surgical invasiveness, which caninclude reaming of bone.

In some embodiments, the third surface 208 defines a first, maximumdiameter 502 and a second diameter 504 that is perpendicular to andbisects the first diameter 502. The first diameter 502 can be defined bythe maximum distance between any two points on the third surface 208. Insome embodiments, the second channel opening 308 is closer to the seconddiameter 504 than the first diameter 502. For example, the channel 304can go from the third surface 208 through the body 202 to the firstsurface 204, rather than through the second surface 206, enablingimproved fixation of the glenoid component 100 while avoiding thecreation of openings on the second surface 206. In some embodiments, theat least one alignment member 212 can include two or more alignmentmembers 212. For example, two alignment members 212 can be located onone side of the glenoid component 100 as demarcated by a line passingthrough the maximum diameter 502. In some embodiments, two alignmentmembers 212 can be located on opposite sides of the glenoid component100 as demarcated by a line passing through the minimum diameter 504.

Referring to FIG. 6, a side view of an embodiment of the glenoidcomponent 100 with a bone engagement member 210 disposed within thechannel 304 is shown. In some embodiments, the bone engagement member210 can extend partially or completely through the channel 304. The boneengagement member 210 can intersect the first plane 802 as shown in FIG.8 and described herein defined by the first channel opening 306.

The glenoid component 100 can include at least one alignment member 212defining an alignment axis 602. In some embodiments, the glenoidcomponent includes a first alignment member 212A defining a firstalignment axis 602A and a second alignment member 212B defining a secondalignment axis 602B. The first alignment axis 602A can intersect thefirst alignment member 212A at a single point. The second alignment axis602B can intersect the second alignment member 212B at a single point.The first alignment axis 602A and the second alignment axis 602B candefine a second plane 604 perpendicular to the first plane 802 as shownin FIG. 8 and described herein. The channel axis 310 can intersect thesecond plane at a point 606 between the first alignment axis 212A andthe second alignment axis 212B. The orientation of the channel axis 310can enable a bone engagement member 210 to be received in aposterior-to-anterior manner, thereby deterring the humeral head fromdislocating posteriorly. The point 606 can be closer to the firstalignment member 212A than to the second alignment member 212B. Thepoint 606 can be closer to the second alignment member 212B than to thefirst alignment member 212A. The point 606 can be equidistant from thefirst alignment member 212A and the second alignment member 212B.

Referring to FIG. 7, a side view of an embodiment of the glenoidcomponent 100 is shown. In some embodiments, the third surface 208 isthicker near the second channel opening 308 than on an opposite side ofthe third surface 208. For example, a thickness 209 of the third surface208 adjacent to the second channel opening 308 can be greater than athickness 209 of the third surface 208 on an opposite side of the thirdsurface 208 from the second channel opening 308, such as at a positionon the third surface 208 diametrically opposed from the second channelopening 308.

In some embodiments, the third surface 208 defines a first tangent line702 tangent to the third surface 208 adjacent to the second channelopening 308. The first tangent line 702 can be tangent or adjacent tothe second channel opening 308. The third surface 208 can define asecond tangent line 704 tangent to the third surface 208 on an oppositeside of the third surface 208 from the second channel opening 308, suchas at a position on the third surface 208 diametrically opposed from thesecond channel opening 308.

The body 202 of the glenoid component 100 can define a shape that allowsthe glenoid component 100 to contour with the shape of a glenoid cavity.The first angle 706 and second angle 708 described below can allow thechannel 304 to extend from the first surface 204 to the third surface208 without intersecting the second surface 206. The glenoid component100 can define a first angle 706 between a second plane 708perpendicular to the first tangent line 702 and the first surface 204where the third surface 208 meets the first surface 204 (e.g., at whereedge 205 of the third surface 208 meets the first tangent line 702) isgreater than or equal to 5 degrees and less than or equal to 45 degrees.In some embodiments, a second angle 710 defined between a third plane712 perpendicular to the second tangent line 704 and the first surface204 where the third plane 712 meets the first surface 204 (e.g., atwhere edge 207 of the first third surface 208 meets the second tangentline 704) is greater than or equal to 5 degrees and less than or equalto 45 degrees. The first angle 706 can be less than, equal to, orgreater than the second angle 708. In some embodiments, the first angle706 and the second angle 710 can be selected to match the contours ofthe glenoid cavity. In some embodiments, the first angle 706 and thesecond angle 710 can be selected to allow the channel 304 to passthrough the body 202 of the glenoid component 100 without the channel304 passing through the second surface 206. In some embodiments, firstsurface 204 at the point where the second angle 710 is defined slopesfaster than at the point where the first angle 706 is defined. In someembodiments, first surface 204 at the point where the first angle 706 isdefined has a smaller gradient than at the point where the second angle710 is defined. In some embodiments, first surface 204 at the pointwhere the first angle 706 is defined has a smaller slope than at thepoint where the second angle 710 is defined. In some embodiments, firstsurface 204 at the point where the second angle 710 is defined has alarger gradient than at the point where the first angle 706 is defined.

In some embodiments, the second plane 708 and the third plane 712 areparallel or intersect one another. In some embodiments, the second plane708 is tangent to the first surface 204. In some embodiments, the secondplane 708 does not intersect the body 202 of the glenoid component 100.In some embodiments, the second plane 708 intersects the channel axis310. In some embodiments, the third plane 712 is tangent to the thirdsurface 208. In some embodiments, the third plane 712 intersects thebody 202 of the glenoid component 100. In some embodiments, the thirdplane 712 intersects the channel axis 310.

Referring to FIG. 8, a side view of an embodiment of the glenoidcomponent 100 is shown. The channel 304 can define a channel axis 310passing through the body 202. The channel axis 310 can extend throughthe first channel opening 306 and the second channel opening 308. Thechannel axis 310 can intersect a first plane 802 as shown in FIG. 8 anddescribed herein defined by the first channel opening 306 at an angle804 transverse to the first plane 802. The channel axis 310 canintersect the first plane 802 at an angle 804 greater than 0 degrees andless than 90 degrees. The angle 804 can be transverse to the first plane802 such that the channel axis 310 is not perpendicular to the firstsurface 204. The plane 802 can divide the body 202 into twosubstantially equal or congruent parts.

In some embodiments, the body 202 defines a bisecting plane 806 thatbisects the body 202 and is perpendicular to the first surface 204. Theat least one alignment member 212 can be on an opposite side of thebisecting plane 806 from the second channel opening 308. In someembodiments, the body 202 defines a bisecting plane 806 that issubstantially bisecting. For example, the bisecting plane 806 can dividethe body 202 into two substantially equal or congruent parts.

Referring to FIG. 9, a perspective view of the glenoid componentproximate to a reamed portion 102 of shoulder bone is shown. In someembodiments, the portion 102 of the shoulder bone can include analignment member cavity 902. The alignment member cavity 902 can includea variety of shapes. For example, in various embodiments, the alignmentmember cavity 902 can include a substantially cylindrical shape, asubstantially rod shape, or any other shape allowing the alignmentmember 212 to slot into the alignment member cavity 908. The alignmentmember cavity 902 can be surgically created to allow the glenoidcomponent 100 to align itself with the glenoid cavity. In someembodiments, the portion 102 of the shoulder bone can include aplurality of alignment member cavities 902.

In some embodiments, the portion 102 of the shoulder bone can include abone engagement cavity 904. The bone engagement cavity 904 can include avariety of shapes. For example, in various embodiments, the boneengagement cavity 904 can include a substantially cylindrical shape, asubstantially rod shape, or any other shape allowing the bone engagementmember 210 to slot into the bone engagement cavity 904. The boneengagement cavity 904 can be surgically created to allow the glenoidcomponent 100 to affix or attach to a portion 102 of the shoulder bone.In some embodiments, the portion 102 of the shoulder bone can include aplurality of bone engagement cavities 904.

As utilized herein, the terms “approximately,” “about,” “substantially”,and similar terms are intended to have a broad meaning in harmony withthe common and accepted usage by those of ordinary skill in the art towhich the subject matter of this disclosure pertains. It should beunderstood by those of skill in the art who review this disclosure thatthese terms are intended to allow a description of certain featuresdescribed and claimed without restricting the scope of these features tothe precise numerical ranges provided. Accordingly, these terms shouldbe interpreted as indicating that insubstantial or inconsequentialmodifications or alterations of the subject matter described and claimedare considered to be within the scope of the disclosure as recited inthe appended claims.

It should be noted that the term “exemplary” and variations thereof, asused herein to describe various embodiments, are intended to indicatethat such embodiments are possible examples, representations, orillustrations of possible embodiments (and such terms are not intendedto connote that such embodiments are necessarily extraordinary orsuperlative examples).

The term “coupled” and variations thereof, as used herein, means thejoining of two members directly or indirectly to one another. Suchjoining may be stationary (e.g., permanent or fixed) or moveable (e.g.,removable or releasable). Such joining may be achieved with the twomembers coupled directly to each other, with the two members coupled toeach other using a separate intervening member and any additionalintermediate members coupled with one another, or with the two memberscoupled to each other using an intervening member that is integrallyformed as a single unitary body with one of the two members. If“coupled” or variations thereof are modified by an additional term(e.g., directly coupled), the generic definition of “coupled” providedabove is modified by the plain language meaning of the additional term(e.g., “directly coupled” means the joining of two members without anyseparate intervening member), resulting in a narrower definition thanthe generic definition of “coupled” provided above.

The term “or,” as used herein, is used in its inclusive sense (and notin its exclusive sense) so that when used to connect a list of elements,the term “or” means one, some, or all of the elements in the list.Conjunctive language such as the phrase “at least one of X, Y, and Z,”unless specifically stated otherwise, is understood to convey that anelement may be either X, Y, Z; X and Y; X and Z; Y and Z; or X, Y, and Z(i.e., any combination of X, Y, and Z). Thus, such conjunctive languageis not generally intended to imply that certain embodiments require atleast one of X, at least one of Y, and at least one of Z to each bepresent, unless otherwise indicated.

References herein to the positions of elements (e.g., “top,” “bottom,”“above,” “below”) are merely used to describe the orientation of variouselements in the FIGURES. It should be noted that the orientation ofvarious elements may differ according to other exemplary embodiments,and that such variations are intended to be encompassed by the presentdisclosure.

What is claimed is:
 1. A glenoid component for use in a shoulderprosthesis, comprising: a body including a first surface that is convexand a second surface opposite the first surface, the second surface isconcave; a third surface connecting the first surface to the secondsurface; a channel extending from a first channel opening of the firstsurface through the body to a second channel opening defined on thethird surface, the channel having a channel axis extending through thefirst channel opening and the second channel opening, the channel axisintersecting a first plane defined by the first channel opening at anangle transverse to the first plane, the channel configured to receive abone engagement member to attach the body to a shoulder bone; at leastone alignment member extending from the first surface to align the bodyto the shoulder bone; and a bone engagement member to attach the body tothe shoulder bone, the bone engagement member to occupy at least aportion of the channel
 2. The component of claim 1, wherein: the thirdsurface defines a first tangent line tangent to the third surfaceadjacent to the second channel opening and a second tangent line tangentto the third surface on an opposite side of the third surface from thesecond channel opening; and at least one of (i) a first angle definedbetween a second plane perpendicular to the first tangent line and thefirst surface where the third surface meets the first surface is greaterthan or equal to 5 degrees and less than or equal to 45 degrees; or (ii)a second angle defined between a third plane perpendicular to the secondtangent line and the first surface where the third plane meets the firstsurface is greater than or equal to 5 degrees and less than or equal to45 degrees.
 3. The component of claim 1, wherein: the third surfacedefines a first, maximum diameter, and a second diameter that isperpendicular to and bisects the first diameter; and the second channelopening is closer to the second diameter than the first diameter.
 4. Thecomponent of claim 1, wherein: a width of the third surface adjacent tothe second channel opening is greater than a width of the third surfaceon an opposite side of the third surface from the second channelopening.
 5. The component of claim 1, wherein: the at least onealignment member includes a first alignment member defining a firstalignment axis and a second alignment member defining a second alignmentaxis, the first alignment axis and second alignment axis define a secondplane perpendicular to the first plane, and the channel axis intersectsthe second plane between the first alignment axis and the secondalignment axis.
 6. The component of claim 1, wherein: the body defines abisecting plane that bisects the body and is perpendicular to the firstsurface; and the at least one alignment member is on an opposite side ofthe bisecting plane from the second channel opening.
 7. The component ofclaim 1, wherein the second surface is free of openings.
 8. Thecomponent of claim 1, wherein the bone engagement member is receivedposteriorly to anteriorly by the channel.
 9. The component of claim 1,wherein the at least one alignment member is integral with the body. 10.The component of claim 1, wherein the first surface is textured.
 11. Atotal shoulder arthroplasty system, comprising: a body including a firstsurface that is convex and a second surface opposite the first surface,the second surface is concave; a third surface connecting the firstsurface to the second surface; a channel extending from a first channelopening of the first surface through the body to a second channelopening defined on the third surface, the channel having a channel axisextending through the first channel opening and the second channelopening, the channel axis intersecting a first plane defined by thefirst channel opening at an angle transverse to the first plane, thechannel configured to receive a bone engagement member to attach thebody to a shoulder bone; at least one alignment member extending fromthe first surface to align the body to the shoulder bone; and a boneengagement member to attach the body to the shoulder bone, the boneengagement member to occupy at least a portion of the channel.
 12. Thetotal shoulder arthroplasty system of claim 11, wherein: the thirdsurface defines a first tangent line tangent to the third surfaceadjacent to the second channel opening and a second tangent line tangentto the third surface on an opposite side of the third surface from thesecond channel opening; and at least one of (i) a first angle definedbetween a second plane perpendicular to the first tangent line and thefirst surface where the third surface meets the first surface is greaterthan or equal to 5 degrees and less than or equal to 45 degrees; or (ii)a second angle defined between a third plane perpendicular to the secondtangent line and the first surface where the third plane meets the firstsurface is greater than or equal to 5 degrees and less than or equal to45 degrees.
 13. The total shoulder arthroplasty system of claim 11,wherein: the third surface defines a first, maximum diameter, and asecond diameter that is perpendicular to and bisects the first diameter;and the second channel opening is closer to the second diameter than thefirst diameter.
 14. The total shoulder arthroplasty system of claim 11,wherein: a width of the third surface adjacent to the second channelopening is greater than a width of the third surface on an opposite sideof the third surface from the second channel opening.
 15. The totalshoulder arthroplasty system of claim 11, wherein: the at least onealignment member includes a first alignment member defining a firstalignment axis and a second alignment member defining a second alignmentaxis, the first alignment axis and second alignment axis define a secondplane perpendicular to the first plane, and the channel axis intersectsthe second plane between the first alignment axis and the secondalignment axis.
 16. The total shoulder arthroplasty system of claim 11,wherein: the body defines a bisecting plane that bisects the body and isperpendicular to the first surface; and the at least one alignmentmember is on an opposite side of the bisecting plane from the secondchannel opening.
 17. The total shoulder arthroplasty system of claim 11,wherein the second surface is free of openings.
 18. The total shoulderarthroplasty system of claim 11, wherein the bone engagement member isreceived posteriorly to anteriorly by the channel.
 19. The totalshoulder arthroplasty system of claim 11, wherein the at least onealignment member is integral with the body.
 20. The total shoulderarthroplasty system of claim 11, wherein the first surface is textured.